The single action pull on my 439 is significantly heavier than my 39-2 or 3906. I'm having a heck of a time shooting decent groups with it at the range. How easy is it for a pistol smith to reduce the trigger pull a bit?

Just noticed the Wolf hammer spring kits. Does anyone have experience with these?

UpNorth- Having the same problem with my "new to me" 6906. I asked the same question in the Gunsmith section of this forum. I decided to get some reduced power hammer and trigger return springs to see if that reduces trigger pull without affecting reliability. FYI- I took my 6906 completely apart to make sure I could replace the springs before ordering. Good instructions available on YouTube. A good cleaning and light lubrication didn't reduce trigger pull, but made is much smoother in both DA and SA.